Patients verbally rate changes in headache, dizziness, nausea and fogginess symptoms compared to their immediate pre-assessment state on a scale of 0 (none) to 10 (severe) following each VOMS assessment to determine if any domain provokes symptoms. Convergence is assessed by both symptom report and objective measurement of the near point of convergence (NPC). NPC values are averaged across 3 trials, and normal NPC values are within 5cm.

Advantages: The VOMS requires limited equipment: 14 pt font NPC hand held fixation stick, metronome, and 1 page paper scoring form, and only takes approximately 5 minutes to administer and score. Clinical cut-off scores are available (2+ symptom provocation on any item, and 5+ cm on average NPC distance). Initialy evidence suggests the tool is good in identifying concussion and tracking recovery of vestibular/ocular motor domains.

Limitations: With the exception of the NPC distance measure, the VOMS focuses mostly on subjective symptom reporting.